Flash navbar resize height only to fit browser

I am trying to make a site that is fluid like this one:


So I decided to try doing it by creating the flash elements separately and aligning them to different positions on the page.

I want the width of my swf to be fixed, but the height to fit the browser. How could I do this? When I say in CSS height: 100% it makes it doesn’t do 100% of the browser size.